Physio-Control LIFEPAK 20e - Manual (Page 162)

Specifications and Performance Characteristics
A-10 LIFEPAK 20e Defibrillator/Monitor Operating Instructions
Audible Alarms This is a standalone device. All alarm tones are internal to the
biphasic LIFEPAK 20e defibrillator/monitor.
Alarm violations are manifest by tones, voice prompts, and
visual indications.
Alarm manifestation occurs within 1 second after a displayed
parameter violates its alarm limit. User selectable alarm
volume adjustment is provided. This adjustment does not
allow alarm volume to attain/reach a zero level.
SAS tones reinforce SAS messages provided on the product
display.
The following identifies the tone assignments for each type of
alarm:
• The priority 1 tone is used to alert the user to the possibility
of imminent death. This tone is a 440 Hz and 880 Hz
alternating tone with a 50% duty cycle and a 4 Hz
alternation frequency.
• The priority 2 tone is used to alert the user that a possible
life-threatening condition exists. This tone is a continuous
698 Hz tone.
• The priority 3 tone is used to alert the user that an abnormal
condition exists. Three beeps at 1046 Hz for 100 msec
duration each with a 150 msec silence between the first and
second and the second and third, followed by a 200 msec
silence.
• Priority 3 tones come in single and repeating types: for a
single tone, the 3-beep sequence sounds only once. For a
repeating tone, the 3-beep sequence sounds every 20
seconds.
• The priority 4 tone is a momentary tone between 500 and
1500 Hz. Specific characteristics are:
– QRS and Volume Setting Tone - 100 msec duration at
1397 Hz.
– Key click - 4 msec duration at 1319 Hz.
The alert tone shall consist of one set of two tones to precede
voice prompts and to draw attention to the display. Specific
characteristics shall be:
• 1000 Hz square wave, 100 msec duration.
• Silence, 100 msec duration.
• Silence, 140 msec duration (when preceding a voice
prompt).
• Voice prompt, when used.
CHARACTERISTIC